Structural components of a vehicle seat with a linear adjustment device

Abstract

Structural components of a vehicle seat (1), comprising: a seat part structural component (10); a floor structural component (13); a front swing element (120) pivotally coupled to the seat part structural component (10) at a pivot point (B1) in the front upper part; and a rear swing element (121) pivotally coupled to the seat part structural component (10) at a pivot point (A1) in the rear upper part. The drive device (14) has a linear element (140) and a transmission element (141) operatively connected to the linear element (140). The linear element (140) assumes a first angle (α0) with a virtual straight line (L2) extending through the pivot point (B1) in the front upper part and the pivot point (A1) in the rear upper part in a first end position, and assumes a second angle (α1) with the line (L2) in a second end position, wherein the linear element (140) is arranged at a right angle to the line (L2) in an intermediate position and spans this right angle when adjusted between the first end position and the second end position.

Description

Field of the Invention

[0001] The present invention relates to a structural component of a vehicle seat. Background Art

[0002] Such a structural component includes a seat part structural component, a floor structural component, a front swing element, and a rear swing element arranged longitudinally behind the front swing element. The front swing element is pivotably coupled to the seat part structural component at a pivot point in the upper front part. In contrast, the rear swing element is pivotably coupled to the seat part structural component at a pivot point in the upper rear part. The drive device has a linear element extending between the floor structural component and the seat part structural component and a transmission element acting on the linear element. The linear element and the transmission element can be linearly adjusted relative to each other so that the seat part structural component is adjusted relative to the floor structural component between a first end position and a second end position.

[0003] In particular, this structural component can form a seat height adjustment device for adjusting the height of a seat frame of the seat part structural component relative to the floor structural component, for example, relative to a longitudinal adjustment device that couples the vehicle seat to the vehicle floor. Therefore, the drive device exerts an adjustment force on the seat part structural component to adjust the height position of the seat part structural component relative to the floor structural component. To exert the adjustment force, a linear element in the form of, for example, a lead screw can move linearly, where the linear element is supported, for example, at one end on the floor structural component and supported on the seat part structural component via the transmission element, so that a change in the position of the seat part structural component relative to the floor structural component is caused by the adjustment movement of the linear element.

[0004] In such a structural component that forms a height adjustment device, the adjustment of the seat part structural component driven by the drive device is performed, for example, in a loaded state of the vehicle seat, that is, in a state where a user is sitting on the vehicle seat. Therefore, a relatively large force may need to be applied for adjustment, where the adjustment is performed when the front swing element and / or the rear swing element pivot relative to the seat part structural component, and thereby the seat part structural component is lifted or lowered relative to the floor structural component.

[0005] When the adjustment force to be applied by the drive device changes during the adjustment stroke when the seat part structural component is adjusted between the first end position and the second end position, this may cause a change in the motor speed and consequently an irregular acoustic effect that may make the user feel uncomfortable. Therefore, there is a desire to provide a kinematics for adjusting the seat part structural component that can achieve regular adjustment while having at least approximately constant adjustment force and consequently constant motor speed and acoustic effect.

[0006] A vehicle seat with a height - adjustable seat part is known from DE 199 14 163 A1. The seat part is coupled to the seat track via a swing element in the form of a rocker. The seat part can be adjusted in terms of its height position relative to the seat track via a linearly adjustable drive in the form of a lead - screw drive.

[0007] Other structural forms of vehicle seats with height - adjustable seat parts are known, for example, from US2010 / 213341A and US2008 / 179932 A.

[0008] A seat device is known from US2020 / 086995 A, in which a linear regulator is plugged in at one end to a floor structural component and at the other end to a swing element, and a height adjustment of the seat part can be caused by a linear adjustment of a linear element in the form of a lead - screw. Summary of the Invention

[0009] The object of the present invention is to provide a structural component of a vehicle seat that enables a kinematically favorable adjustment on the seat - part structural component, while improving the acoustic effect, having a simple structure, and advantageously introducing forces into the seat - part structural component.

[0010] This object is solved by the subject matter having the features of the present invention.

[0011] Therefore, the linear element occupies a first angle with respect to an imaginary straight line extending through the front - upper swing point and the rear - upper swing point in a first end position, and occupies a second angle with respect to the imaginary straight line extending through the front - upper swing point and the rear - upper swing point in a second end position. The linear element is arranged at a right - angle to the imaginary straight line extending through the front - upper swing point and the rear - upper swing point in an intermediate position, and spans this right - angle when being adjusted between the first end position and the second end position.

[0012] In this structural component, the adjustment of the seat - part structural component relative to the floor structural component is carried out using a linear adjustment device formed by a linear element and a transmission element. The linear element and the transmission element can be linearly adjusted relative to each other, and thereby a position change of the seat - part structural component relative to the floor structural component can be caused. The adjustment can be carried out using favorable kinematics, and this power mechanism can in particular achieve a regular adjustment force and, concomitantly, a constant motor speed of the drive device and a regular acoustic effect of the motor.

[0013] This is achieved in that, based on the arrangement of the linear element in the form of a spindle relative to the pivot point of the pivot element arranged on the seat part structural component, the adjustment force can be balanced during the adjustment stroke, so that when the seat part structural component is adjusted between the first end position and the second end position relative to the floor structural component, a substantially constant force acts during the adjustment stroke, and thereby the motor speed only varies within a small range, and a balanced acoustic effect of the motor of the drive device is obtained.

[0014] This is based on the knowledge that the adjustment force of the linear adjustment device can be assumed to be maximum when the linear element is at right angles to the line extending between the front upper pivot point of the front pivot element and the rear upper pivot point of the rear pivot element. If the linear element spans an angular range around the right angle, which is preferably relatively small, when the seat part structural component is adjusted between the end positions, at least a substantially regular adjustment force and a corresponding favorable force introduction and kinematics can be obtained during the adjustment.

[0015] When the structural component is conventionally arranged and used in a vehicle, the longitudinal direction points in the forward direction of the vehicle. In contrast, the vertical direction corresponds to the vehicle vertical direction and points perpendicular to the longitudinal direction.

[0016] The angle between the linear element and the line extending through the front upper pivot point and the rear upper pivot point is measured in the projection onto the plane spanned by the longitudinal direction and the vertical direction. Transversely to this plane, the linear element and the pivot element can be offset from each other. In the projection, the linear element has a right angle relative to the imaginary straight line extending through the front upper pivot point and the rear upper pivot point in the middle position, and spans this right angle when the seat part structural component is adjusted between the first end position and the second end position.

[0017] Preferably, the seat part structural component is adjacent to the floor structural component in the first end position. The seat part structural component can be moved from the first end position to the second end position by being driven by the drive device, and in the second end position, it is, for example, lifted relative to the floor structural component and thus moved away from the floor structural component in the vertical direction extending perpendicular to the longitudinal direction. Therefore, this structural component functions as a height adjustment device that can adjust the seat part structural component vertically relative to the floor structural component in the vertical direction to adjust the vertical positioning of the seat part structural component.

[0018] Within the range of height adjustment, due to the pivoting movement of the pivot element, the adjustment does not occur only in the vertical direction, but in the plane spanned by the longitudinal direction and the vertical direction, so that the seat part structural component performs a superimposed movement in the vertical direction and the longitudinal direction during the adjustment.

[0019] In a design, a first angle assigned to a first end position is less than 90°, and a second angle assigned to a second end position is greater than 90°. These two angles are measured respectively in the direction when the rear swing element is adjusted along the imaginary straight line extending through the swing points of the front upper part and the rear upper part. When the seat part structure assembly is adjusted by the driving device, the position of the imaginary straight line extending through the swing points of the front upper part and the rear upper part changes, and in addition, the position of the linear element relative to this line also changes. The change in the position of the line occurs due to the adjustment movement of the seat part structure assembly. During adjustment, the linear element pivots here due to its coupling with the floor structure assembly and the seat part structure assembly, so that the angle between the line and the longitudinal extension direction of the linear element changes. During the adjustment movement, the linear element crosses an angle of 90° with the line extending through the swing points of the front upper part and the rear upper part. Among them, the linear element is arranged on one side of the right angle in the first end position, and on the other side of the right angle in the second end position. Correspondingly, the angle in the first end position is, for example, less than 90°, and the angle in the second end position is, for example, greater than 90°. These angles are measured respectively in the direction when the seat part structure assembly is adjusted from the first end position to the second end position and swings along the rear swing element starting from the imaginary straight line.

[0020] In a design, the angular range swept by the linear element relative to the line extending through the swing points of the front upper part and the rear upper part when the seat part structure assembly is adjusted can be centered approximately at a right angle. Here, there is approximately a maximum adjustment force at an angle of 90°. Among them, the adjustment force preferably varies only slightly within this angular range, and thus the balance of the adjustment force is obtained, and furthermore, a favorable force introduction and a kinematics beneficial to the operating behavior of the driving device are obtained.

[0021] In a design, the seat part structure assembly has a frame part. In a design, the swing points of the front upper part and the rear upper part are fixedly arranged on the frame part in this orientation. Therefore, the front swing element and the rear swing element can pivot relative to the frame part respectively.

[0022] Generally, the seat part structure assembly here has two frame parts spaced apart from each other in the transverse direction, and each of them has two swing elements in the form of so-called rockers arranged on it, so that the arrangement of the swing elements is provided on both sides of the seat part structure assembly (viewed in the transverse direction), which enables the adjustment of the seat part structure assembly relative to the floor structure assembly especially in the vertical direction.

[0023] In one design, the front swing element is coupled to the floor structure assembly at a swing point at the front lower part, and the rear swing element is coupled to the floor structure assembly at a swing point at the rear lower part. Therefore, the swing element, the seat part structure assembly and the floor structure assembly together form a four-bar linkage mechanism, so that the position of the seat part structure assembly relative to the floor structure assembly can be changed by pivoting the swing element on the seat part structure assembly, and in particular, vertical adjustment of the seat part structure assembly is possible.

[0024] In one embodiment, the linear element is coupled to the floor structure component at a lower coupling point and to the seat part structure component at an upper coupling point. The linear element is thus supported on the one hand on the floor structure component and on the other hand on the seat part structure component, wherein the coupling can each be embodied in an articulated manner such that when the seat part structure component is adjusted, the linear element can change its pivot position both relative to the floor structure component and relative to the seat part structure component.

[0025] For example, the linear element can be connected at one end in an articulated manner to a floor structure component, for example to an upper rail of a vehicle seat that enables a longitudinal adjustment of the floor structure component. In this case, the transmission element can be, for example, a component of an adjustment transmission that is arranged on the seat part structure component in a pivotable manner and enables the transmission element to be driven to achieve a linear adjustment along the linear element.

[0026] In one embodiment, the lower coupling point of the linear element is arranged behind the rear lower pivot point of the rear pivot element as viewed in the longitudinal direction. The linear element is therefore arranged on the floor structure component at a location behind the connection point of the rear pivot element to the floor structure component as viewed in the longitudinal direction.

[0027] Additionally or alternatively, the lower coupling point can be arranged below an imaginary straight line extending through the swivel point of the front lower part and the swivel point of the rear lower part. Thus, the lower coupling point supporting the linear element on the floor structure component is arranged on the side of the line extending through the swivel point of the front lower part and the swivel point of the rear lower part facing away from the seat part structure component.

[0028] In a design, the last coupling point can be arranged on the seat part structural component in a fixed position.For example, the last coupling point can be arranged above the imaginary straight line extending through the swing point of the front upper portion and the swing point of the rear upper portion.

[0029] By arranging the lower coupling point behind and below the pivot point of the rear lower part of the rear swing element, and arranging the upper coupling point above the pivot point of the rear upper part (preferably also in front of the pivot point of the rear upper part), it can be achieved that the linear element only undergoes relatively small position changes during the adjustment movement of the seat part structure assembly, and thus is adjusted relative to the seat part structure assembly only within a relatively small angular range. Since the position of the linear element relative to the seat part structure assembly remains at least approximately vertical, and the linear element extends within a narrow range around the right angle formed by the line between the upper pivot point of the swing element, a balance is obtained in the kinematic force change curve, and thus favorable operating characteristics are obtained.

[0030] In a design, in the projection on the plane developed to the longitudinal direction and the vertical direction, the linear element always intersects the imaginary line extending between the pivot point of the rear lower part and the pivot point of the rear upper part of the rear swing element. This imaginary line substantially corresponds to the longitudinal extension direction of the rear swing element. Therefore, the linear element always (i.e., within the entire adjustment range) intersects the rear swing element. Here, the linear element is at least approximately vertically oriented and pivots within an angular range preferably significantly smaller than the swing angle of the swing element.

[0031] In a design, the value of the first angular difference between the first angle and the right angle and / or the second angular difference between the second angle and the right angle is less than 45°, preferably less than 30°, more preferably less than 20°. Therefore, the angular adjustment of the linear element relative to the imaginary line extending through the pivot point of the front upper part and the pivot point of the rear upper part is preferably small, for example less than 90°, preferably less than 60°, more preferably less than 40°, so that the linear element sweeps through a relatively small angle during adjustment, and thus undergoes a small angular change relative to the seat part structure assembly. Therefore, during adjustment, the linear element substantially maintains a vertical orientation, while the force introduction is balanced and thus there is at least approximately a constant adjustment force over the adjustment stroke.

[0032] In a design, when the seat part structure assembly is adjusted between the first end position and the second end position relative to the floor structure assembly, the transmission element and the linear element undergo a linear adjustment stroke relative to each other, and this adjustment stroke is greater than the vertical lift of the seat part structure assembly. During adjustment, the transmission element is linearly adjusted relative to the linear element. If the transmission element travels a greater stroke relative to the linear element than the seat part structure assembly travels in the vertical direction relative to the floor structure assembly, a favorable amplification conversion ratio is obtained, where the relatively small adjustment force of the drive motor of the drive device is amplified into a greater adjustment force acting on the seat part structure assembly for adjusting the seat part structure assembly relative to the floor structure assembly.

[0033] In one design, the linear element consists of a lead screw. In contrast, the transmission element consists of a lead screw nut that meshes with the threads of the lead screw. At the inner hole, the lead screw nut can have threads that mesh with the external threads of the lead screw, so that when twisted, the lead screw nut rolls on the lead screw, and thereby the lead screw is longitudinally adjusted relative to the lead screw nut. For example, driven by a drive motor, the lead screw nut can be put into rotational motion so as to twist the lead screw nut relative to the lead screw, and thereby longitudinally adjust the lead screw and the lead screw nut relative to each other.

[0034] In one design, the drive device has an electric motor for driving the linear adjustment of the linear element relative to the transmission element. For example, the electric motor can act on the transmission element in the form of a lead screw nut so as to twist the lead screw nut relative to the linear element in the form of a lead screw, and thereby be longitudinally adjusted along the lead screw. For example, the transmission element can be supported (but possibly swingably) in a fixed orientation on the seat part structure assembly, so that through adjustment, the adjustment force is introduced into the seat part structure assembly, and the seat part structure assembly is adjusted relative to the floor structure assembly.

[0035] To drive the transmission element in the form of a lead screw nut, for example, a drive element in the form of a drive worm can be operatively connected to the lead screw nut, where the drive worm is driven via a drive motor.

[0036] Instead of a lead screw, the linear element can also be designed, for example, by a rack that meshes with a transmission element in the form of a gear.

[0037] As an alternative to the electric design of the drive device, it is also conceivable to manually operate the adjustment drive by manually driving the drive device. Alternatively, the drive can also be configured hydraulically or pneumatically. Description of the Drawings

[0038] The concept of the present invention will be explained in more detail below with reference to the embodiments shown in the figures. Among them:

[0039] Figure 1 A schematic view of a vehicle seat with a height-adjustable seat part structure assembly is shown;

[0040] Figure 2A A schematic kinematic view of the height adjustment of the seat part structure assembly in the lowered position is shown;

[0041] Figure 2B A kinematic view in the intermediate position when the seat part structure assembly is lifted is shown;

[0042] Figure 3A A view of an embodiment of the seat part structure assembly in the lowered position is shown;

[0043] Figure 3B View showing the seat part structural assembly during lifting;

[0044] Figure 4 View showing the adjusting force for the adjusting stroke of the transmission element relative to the linear element in the form of a lead screw; and

[0045] Figure 5 View showing the seat lift for the adjusting stroke of the transmission element on the linear element in the form of a lead screw. Detailed description of the specific implementation

[0046] In one embodiment, Figure 1 The vehicle seat 1 shown in the figure has a seat part structural assembly 10, on which a backrest part 11 (with adjustable inclination) is arranged, and the seat part structural assembly forms the seat surface of the vehicle occupant. For example, the seat part structural assembly 10 can be formed by a seat frame, on which, for example, a seat mounting plate is arranged to provide the seat surface, wherein the seat mounting plate can be adjustable relative to the seat frame, for example, to adjust the seat inclination.

[0047] In the illustrated embodiment, the seat part structural assembly 10 is connected to the floor structural assembly 13 via a height adjustment device 12, and the floor structural assembly is composed of a longitudinal adjustment device for longitudinally adjusting the vehicle seat 1 in the longitudinal direction X.

[0048] The height adjustment device 12 has swing elements 120, 121, which couple the seat part structural assembly 10 to the floor structural assembly 13 in the form of a longitudinal adjustment device. Here, (viewed in the transverse direction extending transversely to the longitudinal direction X and transversely to the vertical direction Z) on each side of the seat part structural assembly 10, two pairs of swing elements 120, 121 can be arranged here, so that the seat part structural assembly 10 is supported and adjustable on both sides via a four-bar linkage mechanism formed by one of the swing elements 120, 121 together with the seat part structural assembly 10 and the floor structural assembly 13 respectively.

[0049] The swing elements 120, 121 are respectively articulated and coupled to the seat part structure assembly 10 and the floor part structure assembly 13. The front swing element 120 (when the vehicle seat 1 is conventionally arranged and used, looking in the forward direction of the vehicle, the front swing element is arranged in front of the rear swing element 121 which is located behind) is arranged in such a way that it can swing on the front attachment of the upper guide rail 130 of the floor structure assembly 13 via the front lower swing point B0 and is coupled to the seat part structure assembly 10 in a swingable manner at the front upper swing point B1. In contrast, the rear swing element 121 is connected to the rear attachment 133 arranged at the upper guide rail 130 in a swingable manner at the rear lower swing point A0 and is coupled to the seat part structure assembly 10 in a swingable manner at the rear upper swing point A1. The upper guide rail 130 is guided in a slidable manner on the lower guide rail 131 in the longitudinal direction X, so that the longitudinal positioning of the vehicle seat 1 can be adjusted relative to each other by moving the guide rails 130, 131.

[0050] When the seat part structure assembly 10 is adjusted relative to the floor structure assembly 13, the swing elements 120, 121 pivot respectively around their swing points B0, B1, A0, A1, thereby changing the position of the seat part structure assembly 10 relative to the floor structure assembly 13 and adjusting the seat part structure assembly 10 especially in its height position along the vertical direction Z.

[0051] In order to adjust the seat part structure assembly 10, the drive device 14 is operatively connected to the seat part structure assembly 10 on the one hand and to the floor structure assembly 13 on the other hand.

[0052] The drive device 14 has a linear element 140 in the form of a lead screw, for example, which is articulated and connected to the upper guide rail 130 of the floor structure assembly 13 at the coupling point S2 and is coupled to the seat part structure assembly 10 via a transmission element 141 in the form of a lead screw nut. The transmission element 141 is supported on the seat part structure assembly 10 in a swingable manner here and forms the coupling point S1, and the linear element 140 in the form of a lead screw is supported on the side of the seat part structure assembly 10 via this coupling point.

[0053] An electric motor 142 is used to drive a drive element 143 in the form of a drive worm, which is connected to the transmission element 141 in the form of a lead screw nut. By driving the electric motor 142, the transmission element 141 can thus be put into rotational motion, so that the transmission element 141 in the form of a lead screw nut rolls on the lead screw 140 due to the thread engagement with the linear element 140 in the form of a lead screw and is thereby longitudinally adjusted along the lead screw 140.

[0054] In the illustrated embodiment, a linear element 140 in the form of a lead screw extends substantially vertically between a seat part structure assembly 10 and a floor structure assembly 13. When the seat part structure assembly 10 is adjusted relative to the floor structure assembly 13, the position of the linear element 140 changes relative to the seat part structure assembly 10 and also relative to the floor structure assembly 13, wherein, due to the arrangement and coupling of the linear element 140 with the seat part structure assembly 10 and the floor structure assembly 13, the linear element 140 substantially maintains its vertical orientation when being adjusted. This enables a kinematics in which the adjustment force can be evenly distributed over the adjustment stroke of the seat part structure assembly 10 relative to the floor structure assembly 13.

[0055] This is illustrated in Figure 2A and Figure 2B which. Figure 2A Shown herein are the positions of the pivot points A0, A1, B0, B1 of the pivot elements 120, 121 when the seat part structure assembly 10 is in the lowered position, and Figure 2B shown are the positions of the pivot points A0, A1, B0, B1 in an intermediate position lifted relative to the position according to Figure 2A .

[0056] In the illustrated embodiment, the linear element 140 is coupled to the floor structure assembly 13 at a coupling point S2 which is arranged behind and below the lower pivot point A0 of the rear pivot element 121, i.e., below a line C connecting the lower pivot points A0, B0 of the pivot elements 120, 121. The upper coupling point S1 defined by a transmission element 141 arranged in a pivotable manner on the seat part structure assembly 10 is arranged herein above a line L2 extending through the upper pivot points A1, B1. The linear element 140 intersects a line L3 between the pivot points A0, A1 of the rear pivot element 121. This is valid respectively in the projection onto a plane spanned by a longitudinal direction X and a vertical direction Z, which plane corresponds to the drawing according to Figure 2A and 2B , wherein the linear element 140 can be arranged offset relative to the pivot elements 120, 121 in a transverse direction extending perpendicular to this plane or can also be arranged substantially in the same plane.

[0057] In the lowered position according to Figure 2A corresponding to the lower end position of the seat part structure assembly 10 on the adjustment stroke relative to the floor structure assembly 13, the linear element 140 extends at an angle α0 with respect to a line L2 extending between the upper pivot points A1, B1 of the pivot elements 120, 121, as Figure 2A can be seen here (the angle α0 is measured in the direction when the rear pivot element 121 is adjusted from the lower end position to the lifted position starting from the line L2). Here, the angle α0 is less than 90°.

[0058] When adjusting the seat part structural component 10 to lift the seat part structural component 10 relative to the floor structural component 13, the transmission element 141 performs a linear adjustment on the linear element 140, and thereby increases the distance between the coupling points S1, S2, as can be seen from the Figures 2A to 2B transition of Figure 2B The intermediate position is shown here, in which the linear element 140 is arranged exactly at a right angle to the line L2 between the upper swing points A1, B1 of the swing elements 120, 121.

[0059] In the position according to Figure 2B , the swing elements 120, 121 pivot out from the position according to Figure 2A , wherein the upper swing points A1, B1 move along the respectively assigned trajectories O1, O3, but the lower swing points A0, B0 still remain fixed in orientation on the assigned guide rails 130 of the floor structural component 13. In addition, the linear element 140 also pivots relative to the floor structural component 13, wherein the transmission element 141 defining the upper coupling point S1 moves along the trajectory O2, and the linear element 140 exactly occupies the right angle formed with the line L2 extending through the upper swing points A1, B1 of the swing elements 120, 121 in the Figure 2B position shown.

[0060] When further pivoting towards the upper end position, as also drawn in Figure 2A , the linear element 140 crosses the right angle formed with the line L2, and in the upper end position, as drawn in Figure 2A , occupies the angle α1 formed with the line L2. The angle α1 is greater than 90°. However, on the one hand, the angular difference between the first angle α0 assigned to the lower end position and the right angle and on the other hand the angular difference between the second angle α1 assigned to the upper end position and the right angle are both relatively small here, for example less than 20°, so that the linear element 140 varies only within a relatively small angular range in terms of its position relative to the line L2 that describes the position of the seat part structural component 10 and extends through the upper swing points A1, B1, and is at least approximately perpendicular to the line L2 over the entire adjustment stroke.

[0061] When adjusting, the linear adjustment stroke of the transmission element 141 relative to the linear element 140 is greater than the lift of the seat part structural component 10 in the vertical direction Z, which results in the drive device 14 providing an amplification conversion ratio, such that a relatively small adjustment force on the electric motor 142 is converted into a relatively large adjustment force acting on the seat part structural component 10.

[0062] Figure 3A and 3BThe kinematics is illustrated based on a specific embodiment of the seat part structural component 10, wherein the swing elements 120, 121 are supported on the lateral frame part 100 of the seat part structural component 10, and the transmission element 141 is enclosed in the housing of the adjustment transmission, and the housing is swingably accommodated on the frame part 100. The kinematics is hereby similar to the kinematics explained with reference to Figure 2A and Figure 2B Explained kinematics.

[0063] As Figure 4 shown, the arrangement and orientation of the linear element 140 between the seat part structural component 10 and the floor structural component 13 result in the adjustment force being substantially regular at least during the adjustment stroke of the seat part structural component 10. Therefore, the adjustment force varies only within a relatively small numerical range over the adjustment stroke between the end positions of the seat part structural component 10. When the linear element 140 exactly occupies a right angle with the line A2 between the upper swing points A1, B1 of the swing elements 120, 121 in the intermediate position shown in Figure 2B the adjustment force on the seat part structural component 10 has a maximum value M.

[0064] Using the described kinematics, a regular linear amplification conversion ratio is obtained in which the linear movement of the transmission element 141 relative to the linear element 140 becomes the lifting movement of the seat part structural component 10, as Figure 5 shows this.

[0065] Due to the balance of the adjustment force and the linear amplification conversion ratio, a favorable operating behavior is obtained, and at the same time, a relatively small change in the motor speed during operation is obtained, and thus a regular motor acoustic effect is obtained as well.

[0066] The linear element 140 can be constructed relatively short, wherein the adjustment stroke of the transmission element 141 relative to the linear element 140 is relatively short. This results in a relatively short bending length, which enables a lightweight design of the linear element 140, for example, by designing a lead screw with a small diameter.

[0067] The basic idea of the present invention is not limited to the above-described embodiments, but can also be implemented in other ways.

[0068] Although the linear element can be formed by a lead screw, this is not mandatory. For example, in an alternative design, the linear element can be composed of a rack or other linearly extending structural components, such as an electric, hydraulic, or pneumatic linear regulator.

[0069] List of reference numerals

[0070] 1 Vehicle seat

[0071] 10 Seat part structural component

[0072] 100 Frame part

[0073] 11 Backrest part

[0074] 12 Height adjustment device

[0075] 120, 121 Swing elements (rocking bars).

[0076] 13 Floor structure assembly (longitudinal adjustment device)

[0077] 130 Upper guide rail

[0078] 131 Lower guide rail

[0079] 132, 133 Accessories

[0080] 14 Drive unit

[0081] 140 Linear element (lead screw)

[0082] 141 Transmission element (lead screw nut)

[0083] 142 Motor

[0084] 143 Driving element (driving worm)

[0085] α0,, α1 Angles

[0086] A0, A1 Swing points

[0087] B0, B1 Swing points

[0088] C (Hypothetical) connection line

[0089] L1 - L3 Lines

[0090] M Maximum amount

[0091] O1 - O3 Loci

[0092] S1, S2 Coupling points

[0093] X Longitudinal direction

[0094] Z Vertical direction

Claims

1. Structural components of a vehicle seat (1), said structural components having: A seat part structural component (10), A floor structural component (13), A front swing element (120) which is swingably coupled to the seat part structural component (10) at a front upper swing point (B1), and which is swingably coupled to the floor structural component (13) at a front lower swing point (B0), A rear swing element (121) arranged behind the front swing element (120) in the longitudinal direction (X), said rear swing element being swingably coupled to the seat part structural component (10) at a rear upper swing point (A1), and said rear swing element being swingably coupled to the floor structural component (13) at a rear lower swing point (A0), and A drive device (14) having a linear element (140) extending between the floor structural component (13) and the seat part structural component (10) and a transmission element (141) operatively connected to the linear element (140), wherein, The linear element (140) and the transmission element (141) can be linearly adjusted relative to each other so that the seat part structure assembly (10) can be adjusted relative to the floor structure assembly (13) between a first end position and a second end position. It is characterized in that In the first end position, the linear element (140) occupies a first angle (α0) with respect to an imaginary straight line (L2) extending through the swing point (B1) of the front upper part and the swing point (A1) of the rear upper part, and in the second end position, it occupies a second angle (α1) with respect to the imaginary straight line (L2) extending through the swing point (B1) of the front upper part and the swing point (A1) of the rear upper part. Wherein, the linear element (140) is arranged at a right angle to the imaginary straight line (L2) extending through the swing point (B1) of the front upper part and the swing point (A1) of the rear upper part in the middle position, and straddles the right angle when being adjusted between the first end position and the second end position. The linear element (140) is composed of a lead screw, and the transmission element (141) is composed of a lead screw nut in threaded engagement with the lead screw.

2. The structural components according to claim 1, characterized in that, In the first end position, the seat part structure assembly (10) is adjacent to the floor structure assembly (13).

3. The structural components according to claim 2, characterized in that, Measured from the imaginary straight line (L2) extending through the swing point (B1) of the front upper part and the swing point (A1) of the rear upper part and along the direction of the rear swing element (121) when adjusting towards the second end position, the first angle (α0) is less than 90°, and the second angle (α1) is greater than 90°.

4. The structural components according to claim 1, characterized in that, The seat part structure assembly (10) has a frame part (100), wherein the swing point (B1) of the front upper part and the swing point (A1) of the rear upper part are fixedly arranged on the frame part (100).

5. The structural components according to claim 1, characterized in that, The linear element (140) is coupled to the floor structure assembly (13) at a lower coupling point (S2), and is coupled to the seat part structure assembly (10) at an upper coupling point (S1).

6. The structural components according to claim 5, characterized in that, Observed along the longitudinal direction (X), the lower coupling point (S2) is arranged behind the swing point (A0) of the rear lower part.

7. The structural components according to claim 5, characterized in that, The lower coupling point (S2) is arranged below an imaginary straight line (C) extending through the swing point (B0) of the front lower part and the swing point (A0) of the rear lower part.

8. The structural components according to claim 5, characterized in that, The upper coupling point (S1) is fixedly arranged on the seat part structure assembly (10).

9. The structural components according to claim 5, characterized in that, The upper coupling point (S1) is arranged above the imaginary straight line (L2) extending through the swing point (B1) of the front upper part and the swing point (A1) of the rear upper part.

10. The structural components according to claim 1, characterized in that, Observed in the projection onto a plane formed by the longitudinal direction (X) and the vertical direction (Z), the linear element (140) always intersects an imaginary straight line (L3) between the swing point (A0) of the rear lower part and the swing point (A1) of the rear upper part.

11. The structural components according to claim 1, characterized in that, The value of the first angular difference between the first angle (α0) and the right angle and / or the second angular difference between the second angle (α1) and the right angle is less than 45°.

12. The structural component according to claim 1, wherein, The value of the first angular difference between the first angle (α0) and a right angle and / or the second angular difference between the second angle (α1) and a right angle is less than 30°.

13. The structural component according to claim 1, wherein, The value of the first angular difference between the first angle (α0) and a right angle and / or the second angular difference between the second angle (α1) and a right angle is less than 20°.

14. The structural component according to claim 1, wherein, When the seat part structural assembly (10) is adjusted between a first end position and a second end position relative to the floor structural assembly (13), the drive element (141) and the linear element (140) undergo a linear adjustment stroke relative to each other, and the adjustment stroke is greater than the vertical lift of the seat part structural assembly (10).

15. The structural component according to claim 1, wherein, The drive device (14) has an electric motor (142) for driving the linear adjustment of the linear element (140) relative to the drive element (141).

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